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    <title>Shared Workers basic example</title>
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    <h1>Shared<br>Workers<br>basic<br>example</h1>
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    <form>
      <div>
        <label for="number3">Square number: </label>   
        <input type="text" id="number3" value="0">
      </div>
    </form>
    <p class="result2">Result: 0</p>
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